LIGO-Virgo GW S190408an: J-GEM optical/NIR follow-up observations. Murata, K. L. ; Sasada, M. ; Nakaoka, T. ; Morokuma, T. ; Utsumi, Y. Abstract Publication: GRB Coordinates Network Pub Date: 2019 Bibcode: 2019GCN.24064....1M